Q1: A self- propelled tamping foot compactor will be used to compact a fill being constructed of clay material. Field tests have shown that the required density can be achieved with four passes of the roller operating at an average speed of 1.5 mph, the compacted lift will have a thickness of 5 inch, the roller width is 7ft, one bcy equal 0.83 compacted cubic yards, the roller production estimated for the project is 510 bcy/hour. How many rollers will be required to maintain this production.

Q1: A self- propelled tamping foot compactor will be used to compact a fill being constructed of clay material. Field tests have shown that the required density can be achieved with four passes of the roller operating at an average speed of 1.5 mph, the compacted lift will have a thickness of 5 inch, the roller width is 7ft, one bcy equal 0.83 compacted cubic yards, the roller production estimated for the project is 510 bcy/hour. How many rollers will be required to maintain this production.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Soil Compaction Test

Soil compaction is the major area of geotechnical engineering. Soil is composed of multiple pores present on its surface, while the soil is mainly composed of gravel, sand, rocks, etc. The arrangement of these rocks and gravels is such that they build up voids (spaces) between them, which allows spaces for the roots of the plants and crops to spread and absorb the required amount of nutrients. Soil compaction is a major problem primarily caused by human activities, micro-organisms, and other multiple factors.

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Q1:
A self- propelled tamping foot compactor will be used to compact a fill being constructed of
clay material. Field tests have shown that the required density can be achieved with four
passes of the roller operating at an average speed of 1.5 mph, the compacted lift will have a
thickness of 5 inch, the roller width is 7ft, one bcy equal 0.83 compacted cubic yards, the
roller production estimated for the project is 510 bey/hour. How many rollers will be
required to maintain this production.

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Downvote for the wrong answers Tamping foot compactors with an optimal production of 428 ccy/hr will be used to compact a 75,000 ccy fill. The shrinkage factor of the soil being used is 0.83. A single scraper with an optimal production of 510 bcy/hr will be used to haul the soil to the fill. a. How many compactors should be used to maintain the scraper's production? b. The compactors being used for this operation cost $90/hr while the scraper costs $110/hr. Assuming a 45-min hour efficiency for all equipment, what will the total cost of this operation be?
2 (a) During the construction of a highway bridge, it is expected that the average permanent load on a clay layer will increase by about 180kPa. The soil profile and some parameters of the soil is given in diagram below. (i) Estimate the value for consolidation settlement if the value of Compression index equal to 0.36. (ii) Determine the surcharge needed to eliminate the entire primary consolidation in 6 months. (i) Suggest a best method to reduce the time and amount of surcharge to eliminate the entire primary consolidation 1.2m ( water table) Yan= 18 kN/m Y= 21 kN/m Sand 7.0m Yer 20 kN/m Clay C- 0.36; CV = 0.38 m/month Sm Sand Y= 23 kN/m 1.0 1.0 Sand Sand 0.8 Clay H = L. Ch 0.6 Sand' Au,= constant RockAu.- constant 0.4 0.2 10 20 30 40 50 60 70 80 90 Average degree of consolidation, U(%) 0.2 0.4 0.6 APn 08 P. 9.1 0,5 I 2 5 10 1.0 1.2 1.4 1.6 40 50 60 70 80 90 100 U (%) Plot of Ap/Apw against U for various values of Ap/p
Question 1: Earth whose in situ weight is 112 pcf, whose loose weight is 95 pcf and whose compacted weight is 120 pcf is placed in a fill at the rate of 250 cy/hr, measured as compacted earth. The thickness of the compacted layers is 6 inch. A compactor with a roller drum width of 84 inch is used to compact the material at a speed of 3.5 mph. Assume a 55 min hour operating efficiency. Determine the number of rollers required to provide the necessary compaction rate if eight drum passes are specified for each layer of earth. O 1 Roller O 3 Rollers O O Roller O 2 Rollers
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A new underground Lead-Zinc-Silver mine is planned to start at a depth of 1200 m below the surface level with an annual ore production of 2 million tons. After performing insitu testing, it was found that the proposed mine site is having very high horizontal stresses compared to the vertical stresses. Based on the given situation, what stability and ground control challenges will be there in your opinion and how you will manage them in a most effective manner without compromising with the safety and stability